Wireless Sensor Networks (WSNs) have been intensely studied because of their potential applications and technological challenges. However, most analysis of WSN performance has used only computer simulations, with greatly simplified assumptions about the performance of the underlying circuits. WSN network lifetime depends upon communication protocols. The Gossip-Based Sleep Protocol (GSP), implements routing and MAC functions in an energy conserving manner. However, measuring network lifetime with even a protocol as simple as GSP is problematic. Multiple approaches are described for measuring...